Exhaust-nozzle for locomotives.



J. L. & T. GALLOWAY. EXHAUST NOZZLE FOR LOCOMOTIVES.

APPLICATION FILED JAN.3,1911.

Patented Oct. 3, 1911.

2 BiHEETS-SHEET 1.

WITNESSES U) Q- AJ COLUMBIA PLANOGRAPH c0., WASHINGTON. D. c.

J. L. & T. GALLOWAY. EXHAUST NOZZLE FOR LOCOMOTIVES.

APPLIGATION FILED JAN. 3,1911.

Patented Oct. 3, 1911.

2 SHEETS-SHEBT 2.

4A a; @122 V /MM $14; M ATTORNEY.

WITNESSES FFTD.

JOHN L. GALLOWAY, OF VALLEY JUNCTION, IOWA, AND THOMAS GALLOWAY, OFCORLISS, WISCONSIN.

EXHAUST-NOZZLE FOR LOCOMOTIVES.

To all whom "it may concern;

' county of Polk, and State of Iowa, and at Corliss, county of Racine,and State of WVisconsin, have invented new and useful Improvements inExhaust-Nozzles for Locomotives, of which the following is aspecification.

Our invention relates to improvements in exhaust nozzles forlocomotives, traction engines, etc.

The object of this invention is to provide an improved construction,whereby the capacity of the nozzle may be automatically varied to suitthe requirements for steam delivery. Under light loads, it is notnecessary to force the draft to any great extent and a small quantity ofsteam is therefore discharged through the nozzle into the smoke stack.here the nozzle is of uniform size under all conditions, it follows thatwith a nozzle of sufficient capacity to receive the full charge of steamdesired to be delivered under heavy load, the small quantity of steamdelivered for a light load becomes dissipated in force before reachingthe stack, owing to expansion in the nozzle. But with an automaticvariation of the nozzle capacity, the full force of the steam may beapproximately exerted whether the load be heavy or light.

Our invention also has for its object, certain structural improvementswhich will be apparent from the description.

In the following description, reference is had to the accompanyingdrawings, in which- Figure 1 is a vertical sectional view of ourimproved nozzle, showing the automatic valve in closed position. Fig. 2is a similar view of one side of the nozzle in vertical section, showing.the valve in open position. Fig. 3 is a cross sectional view, drawnthrough the nozzle immediately above the valve, and showing one segmentof the valve in section, drawn to a lower plane, cutting the centralportion thereof, the valve being shown in closed position. Fig. 4 is asimilar view of a half portion of the nozzle, showing the valve in openposition. Fig. 5 is a view, similar to Fig. 1, but showing a modifiedform of valve in closed position.

Like parts are identified by the same ref- Specification of LettersPatent.

Application filed January 3, 1911.

Patented Oct. 3, 1911.

Serial No. 600,458.

erence characters throughout the several views.

A nozzle casing A is provided with a tapered upper end portion a and isalso provided with a series of slots .9, which slots constitute reliefports for the nozzle. The slots extend segmentally in the wall of thenozzle, preferably substantially at the junc tion between the taperedportion a and the vertical sided portion below it. The casing isprovided with an outwardly extending flange B, whereby the device may besecured to a suitable support within the smoke box of the engine andsuitably connected with the steam supply duct leading from the engine.

The casing A is provided with a second outwardly extending flange C,upon which, in the construction shown in Fig. 1, an

expansible ring valve is mounted, comprising a serles of segments Dconnected by a coiled spring E, said spring preferably encircling theseries of segments and being seated in a channel (Z in the outersurfaces of said segments. Each of said segments D is adapted to closeone of the slots 8 when moved inwardly to the position shown in Fig. 1,said segments, however, being movable outwardly radially on-the uppersurface of the flange C, thus uncovering the slots or ports 8.

An auxiliary casing F, having a generally cone shaped form, is mountedupon the flange C, with which it preferably has threaded engagement, asindicated at This casing provides an annular passage between it and theportion a of the main nozzle casing, whereby when the valve segments Dare in open position, steam is permitted to pass through the ports 8 andupwardly in this annular space G. The walls of this auxiliary casing Fextend beyond the upper end of the wall portion a, as clearly shown inFig. 1. These conically tapered walls a and F constitute the nozzlesproper and the diameter of the opening at the upper end of the wall F,is greater than the diameter of the opening at the upper end of the walla, the capacity of these openings being calculated with reference to theamount of steam to be delivered through them, so as to secure aconcentration of steam into the stack.

Guide pins H mounted in the auxiliary casing wall F, project inwardlyinto suitable channels or sockets in the valve segments D, and thusprevent the valve segments from rotating.

Referring to Fig. 5, it will be observed that the main nozzle casing ris provided with a tapering upper wall portion a, similar in form tothat shown in Fig. 1 and provided with similar slots 8. The casing A isalso provided with a connecting flange B and a supporting flange C,similar to the corresponding flanges B and C in Fig. 1. An auxiliarycasing F is mounted upon the flange C in substantially the same manneras in Fig. 1, although this casing is slightly diiferent in form. Thecasing F is, however, provided with a tapering portion extending beyondthe portion a, so that the portion a and F constitute nozzles in thesame sense that the portion a and F con-- stitute nozzles in Fig. 1. Theprincipal difierence between the two structures consists in the form ofvalve employed to control the delivery of steam through the ports 8 (ors). In Fig. 5 we show an annular vertically sliding valve D having aninward offset J between its upper and lower margins. This valve movesupwardly to closing position and seats against a screw threaded ringstop K. It is lifted resiliently by springs L socketed at L in theflange C and arranged with the upper ends of the springs socketed in thevalve ring D at M.

lVith either of the above described constructions, a delivery of steamunder light load and in quantity proportioned to the load will be takencare of entirely by the inner nozzle casin A in Fig. 1 and A in Fig. 2.Under heavy load, however, a greater quantity of steam will bedelivered, and when this steam becomes excessively throttled in theopening provided by the tapered wall portions A, suhicient back pressurewill be developed to force the valve segments D outwardly in thestructure shown in Fig. 1, or to force the ring valve D downwardly inthe structure shown in F ig. 5 under the pressure of the steam exertedupon the shoulder or oii'set J. In either case, the valve will be movedto open position, whereupon a portion of the steam will be permitted topass through the ports 8 or 8 into the space G (Fig. 1), or G (Fig. 5),and the greater capacity of the outer nozzle casing will in either casetake care of the excess steam thus permitted to discharge.

It will be observed in Fig. 1, that the walls F and a are parallel,while in Fig. 5, the walls converge upwardly to some extent. The featureof structure thus indicated is not essential, nor peculiar to eithertype of nozzle. The walls may be substantially parallel in either case,or there may be a slight convergence in order to more effectivelyconcentrate the steam in the annular space between the two walls. Itwill also be understood that while we have shown and described twodifi'erent forms of valve as adapted to our purposes, we do not limitthe scope of our invention to any specific type of valve for controllingthe delivery of steam through the ports 3. It is not even essential thatthe valve should be automatic, but we prefer to make it automatic inorder to avoid the necessity for manual adjustments and also to providefor continuous adjustments under the varying conditions due to changesof grade load, etc. The stop K (Fig. 5) is made removable merely forstructural pur poses, whereby-we are enabled to adjust the ring D intoand out of position of use.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. An exhaust nozzle for locomotives, consisting in the combination ofinner and outer nozzle casings having their lower portions connectedwith each other and their upper portions tapered inwardly andconstituting steam passages of different size, the outer casing beingextended beyond the inner casing and provided with a larger dischargeorifice forming a common outlet for both passages, and the inner wallbeing provided with ports affording communication between the inner andouter passages.

2. An exhaust nozzle for locomotives, consisting in the combination ofinner and outer nozzle casings having their lower portions connectedwith each other and their upper portions tapered inwardly andterminating in discharge orifices of difierent size, the outer casingbeing extended beyond the inner casing and provided with a largerdischarge orifice forming a common outlet for both nozzle casings, andthe inner wall bein provided with ports affording communication betweenthe interior of said casing and the annular space between the casings,together with valves regulating the delivery of steam through saidports.

3. An exhaust nozzle for locomotives, consisting in the combination ofinner and outer nozzle casings having their lower portions connectedwith each other and their upper portions tapered inwardly andterminating in discharge orifices of different size, the outer casingbeing extended beyond the inner casing and provided with a largerdischarge orifice forming a common outlet for both nozzle casings, andthe inner wall being provided with ports affording communioation betweenthe interior of said casing and the annular space between the casings,together with automatically closing valves regulating the delivery ofsteam through said ports, said valves being adapted to open under apre-determined pressure within the inner casing.

l. The combination with a nozzle casing having a tubular interiorpassage and afwall portion tapering upwardly and contracting saidpassage to a discharge orifice at the upper end of the casing, anauxiliary casing encircling the upper portion of the first mentionedcasing and providing an annular passage between the casings, saidauxiliary casing receiving the contents of both passages at its upperend and also having tapered walls terminating upwardly in a dis chargeorifice of larger size than the first mentioned casing orifice and at apoint beyond the first mentioned casing, said first mentioned casingbeing provided with ports communicating between its interior and theannular space between the casings.

In testimony whereof we afiix our signatures in the presence of twowitnesses.

JOHN L. GALL'OVVAY. THOMAS GALLOVVAY. Vitnesses LEVERETT C. WHEELERLYMAN Gr. WVHEELER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

